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  <a name="ZH-CN_TOPIC_0000001792526306"></a><a name="ZH-CN_TOPIC_0000001792526306"></a>
  <h1 class="topictitle1">周期性执行备份</h1>
  <div>
   <p>将需要保护的资源关联到指定SLA策略，系统将对这些资源按照SLA策略进行保护。</p>
   <div class="section">
    <h4 class="sectiontitle">操作步骤</h4>
    <ol>
     <li><span>选择<span class="uicontrol" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839142377_uicontrol114088356363">“<span id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839142377_text1840913533616">保护</span> &gt; 数据库 &gt; SQL Server”</span>。</span></li>
     <li><span>在<span class="uicontrol">“<span>数据库</span>”</span>页签，选择需要保护的数据库，单击<span class="uicontrol">“<span>保护</span>”</span>。</span><p></p><p>您也可以勾选多个数据库进行批量保护。</p> <p></p></li>
     <li><span>选择用户自行创建的SLA。</span><p></p><p>您也可以单击<span class="uicontrol">“<span>创建</span>”</span>，创建新的SLA。</p>
      <div class="note">
       <img src="public_sys-resources/note_3.0-zh-cn.png"><span class="notetitle"> </span>
       <div class="notebody">
        <p>SQL Server不支持使用系统预置的SLA（Gold、Silver、Bronze）。</p>
       </div>
      </div> <p></p></li>
     <li><span>配置备份策略高级参数。</span><p></p>
      <div class="p" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p7946203592">
       相关参数说明如<a href="#ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_table208961159155817">表1</a>所示。 
       <div class="tablenoborder">
        <a name="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_table208961159155817"></a><a name="zh-cn_topic_0000001839165705_table208961159155817"></a>
        <table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_table208961159155817" frame="border" border="1" rules="all">
         <caption>
          <b>表1 </b>备份策略高级参数说明
         </caption>
         <colgroup>
          <col style="width:29.99%">
          <col style="width:70.00999999999999%">
         </colgroup>
         <thead align="left">
          <tr id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_row198941159175819">
           <th align="left" class="cellrowborder" valign="top" width="29.99%" id="mcps1.3.2.2.4.2.1.2.2.3.1.1"><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p089425925812">参数</p></th>
           <th align="left" class="cellrowborder" valign="top" width="70.00999999999999%" id="mcps1.3.2.2.4.2.1.2.2.3.1.2"><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p19894165945810">说明</p></th>
          </tr>
         </thead>
         <tbody>
          <tr id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_row156337201314">
           <td class="cellrowborder" valign="top" width="29.99%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p24732444489">指定目标位置</p></td>
           <td class="cellrowborder" valign="top" width="70.00999999999999%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 ">
            <div class="p" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p1473184413481">
             如果您部署了集群高可用特性，请指定备份副本的目标存储位置。<span style="color:#282B33;">如不指定，则系统通过智能均衡自动选择备份目标存储单元。</span>
             <ul id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_ul3832679403">
              <li id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_li178323718400">备份存储单元：对应于备份集群节点。选择备份存储单元后，副本将存储至该存储单元。存储单元容量不足时，备份任务将会失败。</li>
              <li id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_li31700914016">备份存储单元组：是备份存储单元的集合。选择备份存储单元组后，系统根据存储单元组的存储策略自动选择备份目标存储单元。</li>
             </ul>
            </div></td>
          </tr>
          <tr id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_row3895959145817">
           <td class="cellrowborder" valign="top" width="29.99%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p10894195925818"><span id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_text115351321132020">限速策略</span></p></td>
           <td class="cellrowborder" valign="top" width="70.00999999999999%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p1661193571218">备份任务平均每秒最大传输的数据量。</p> <p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p208941559135816">选择<a href="zh-cn_topic_0000001839165661.html">已创建的限速策略</a>。</p></td>
          </tr>
          <tr id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_row139691073541">
           <td class="cellrowborder" valign="top" width="29.99%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p096916718545"><span id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_text7290132765518">并发数</span></p></td>
           <td class="cellrowborder" valign="top" width="70.00999999999999%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p179701070541">可同时执行备份任务的个数。取值范围为1~256。</p></td>
          </tr>
          <tr id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_row16864744103216">
           <td class="cellrowborder" valign="top" width="29.99%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p14865344143219"><span id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_text108935592324">源端重删</span></p></td>
           <td class="cellrowborder" valign="top" width="70.00999999999999%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 ">
            <div class="p" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001337708186_p17970945162814">
             开启后，可以减少传输的数据量，但会增加客户端的资源占用。
             <div class="note" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_note8885112682911">
              <span class="notetitle"> 说明： </span>
              <div class="notebody">
               <ul id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_ul5885426132914">
                <li id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_li10885172616299">由于同一个代理主机只能和一个存储单元建链，如果开启源端重删，<span class="parmname" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_parmname1288482662917">“指定目标位置”</span>请选择<span class="parmvalue" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_parmvalue118843260299">“备份存储单元”</span>。否则，由于智能均衡可能会选择到未建链的存储单元，导致源端重删启用失败。如果不同受保护对象关联了不同SLA，且SLA中指定不同的备份存储单元，请为受保护对象选择不同代理主机，否则将会导致部分备份任务源端重删启用失败。</li>
                <li id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_li9885182662911">如果代理主机已经与一个存储单元建链，当该代理主机未执行源端重删备份任务时，可以在代理主机上执行<strong id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_b9845163710167">dataturbo delete storage_object storage_name=</strong><em id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_i19447038131614">?</em>命令（命令中的<strong id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_b1050314315162">storage_name=</strong><em id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_i1237554410161">?</em>可以通过<strong id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_b11885726112912">dataturbo show storage_object</strong>命令查询），删除与存储单元的源端重删链接。再选择该代理主机执行源端重删备份任务，则可以成功与新的存储单元建链。</li>
                <li id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_li11885142615297">请参考<a href="https://info.support.huawei.com/storage/comp/#/oceanprotect" target="_blank" rel="noopener noreferrer">兼容性查询工具</a>查看主机的操作系统类型是否支持源端重删，若不支持，配置源端重删后将不会生效。</li>
                <li id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143189_li7883549153219">若使用内置代理进行备份，配置源端重删后将不会生效。</li>
               </ul>
              </div>
             </div>
            </div></td>
          </tr>
          <tr id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_row96631187124">
           <td class="cellrowborder" valign="top" width="29.99%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 ">
            <div class="p" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p76741220141217">
             任务超过时间窗告警
             <div class="note" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_note267442081212">
              <span class="notetitle"> 说明： </span>
              <div class="notebody">
               <p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001839143213_p8320153562113">仅1.6.0及后续版本支持设置该参数。</p>
              </div>
             </div>
            </div></td>
           <td class="cellrowborder" valign="top" width="70.00999999999999%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p1667482018127">开启后任务执行超过时间窗将发送告警，告警需手动清除。</p></td>
          </tr>
          <tr id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_row59535933011">
           <td class="cellrowborder" valign="top" width="29.99%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p113408251083"><span id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_text15514111782">任务失败告警</span></p></td>
           <td class="cellrowborder" valign="top" width="70.00999999999999%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p7601371993">开启后，任务执行失败后自动发送告警，下次任务成功后告警自动清除。</p></td>
          </tr>
          <tr id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_row18951659135816">
           <td class="cellrowborder" valign="top" width="29.99%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p1789545935810"><span id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_text104199407596">失败后自动重试</span></p></td>
           <td class="cellrowborder" valign="top" width="70.00999999999999%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p489575910583">开启后，备份任务失败后系统自动重试。</p>
            <div class="p" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_p6686112353917">
             支持重试次数为1~5次，等待时长为1~30分钟。如设置为重试3次，等待5分钟，即每5分钟后重试一次，总共重试3次。
             <div class="note" id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001264095230_note139701345152818">
              <span class="notetitle"> 说明： </span>
              <div class="notebody">
               <p id="ZH-CN_TOPIC_0000001792526306__zh-cn_topic_0000001839165705_zh-cn_topic_0000001264095230_p11970194518283">自动重试时系统会创建一个新的备份任务，如果该备份任务不在设定的时间窗内则不会执行，此次备份失败。</p>
              </div>
             </div>
            </div></td>
          </tr>
         </tbody>
        </table>
       </div>
      </div> <p></p></li>
     <li><span>单击<span class="uicontrol">“确定”</span>。</span><p></p><p>如果当前系统时间已晚于该SLA首次备份的开始时间，则关联备份SLA后可以选择在当前立即执行备份或者根据SLA中设置的备份策略等待下次调度。</p> <p></p></li>
    </ol>
   </div>
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    <div class="parentlink">
     <strong>父主题：</strong> <a href="zh-cn_topic_0000001839245561.html">步骤9：执行备份</a>
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